The problem from the Clinton camp’s standpoint, I imagine, is the SS did not move quickly enough to block the view of Hillary before she started having a seizure. People faint, most people know someone who’s fainted, and often the issue is minor. That looks like a seizure to me, and is much more concerning.
Did you see the guy from the right move right over to block the camera’s view? He spotted the filming and moved right in the way. Just an historic tad too late.